import java.util.List;

public class Test {
    public static void main(String[] args) {
        MySingleLinkedList msl = new MySingleLinkedList();
        msl.display();

        msl.addFirst(2);
        msl.addFirst(2);
        msl.addFirst(3);
        msl.addFirst(4);
        msl.addLast(2);
        msl.addIndex(3,90);
        msl.contains(99);
        System.out.println(msl.contains(99));
        msl.remove(3);
        msl.removeAllKey(2);
        msl.clear();

        msl.display();
        System.out.println(msl.size());
    }

}
